[PATCH] D39357: Filter out invalid 'target' items from being passed to LLVM

[Erich Keane via Phabricator via cfe-commits]

erichkeane created this revision.

Craig noticed that CodeGen wasn't properly ignoring the
values sent to the target attribute.  This patch ignores
them.

This patch also sets the 'default' for this checking to 
'supported', since only X86 has implemented the support
for checking valid CPU names and Feature Names.

One test was changed to i686, since it uses a lakemont,
which would otherwise be prohibited in x86_64.


https://reviews.llvm.org/D39357

Files:
  include/clang/Basic/TargetInfo.h
  lib/Basic/Targets/X86.cpp
  lib/CodeGen/CGCall.cpp
  lib/CodeGen/CodeGenModule.cpp
  test/CodeGen/attr-target-x86.c

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